Windows 11 24H2 Security Update Causes SSD/HDD Failures and Potential Data Corruption

Sonik

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Another Windows Update another catastrophic failure for users

Btw, Windows Update Blocker, never trust Microsoft
 

Microsoft rolled out the August 2025 cumulative update for Windows 11 version 24H2, also known as KB5063878. The update was supposed to fix problems with game performance and some app slowdowns, which had been frustrating gamers for months. But instead of smoothing things out, this patch has opened up a new problem: it's causing certain SSDs to fail when writing large numbers of files.The issue isn't universal, but it seems to heavily affect solid-state drives that use Phison controllers. Users began reporting that their systems became unstable when copying or writing large amounts of data, usually in the range of 50 GB or more. In these cases, the drive can suddenly stop functioning properly. After a reboot, Windows may no longer recognize the SSD at all, leaving the partition inaccessible. For anyone storing important files on one of these drives, the risk is significant.

The problem goes beyond consumer systems too. IT administrators using corporate deployment tools such as WSUS and SCCM have noticed another bug tied to this update: error code 0x80240069, which blocks the update from being installed across managed devices. While that's frustrating in an enterprise environment, the SSD failures are more concerning for everyday users, especially because the issue involves potential data loss.

Several SSD models have been singled out as being most vulnerable. These include the Corsair Force MP600, SSDs built around the Phison PS5012-E12 controller, Kioxia Exceria Plus G4, Fikwot FN955, and SanDisk Extreme Pro M.2 NVMe 3D. Reports suggest that once the failure occurs, the operating system can no longer access the partition, forcing a full reformat or even hardware replacement in some cases.

At the moment, the safest course of action is to avoid running extended write operations if you have installed the KB5063878 update and use one of these drives. Tasks such as large backups, moving huge folders, or continuous write-heavy workloads should be postponed until Microsoft releases a fix. If avoiding these tasks isn't an option, making regular backups to an unaffected drive or cloud storage is strongly advised.

For now, Windows 11 users should approach KB5063878 with caution. If your system relies on a Phison-based SSD, particularly one of the listed models, you may want to hold off on applying the update or be prepared to limit heavy file transfers until further information is available.
 
My OS NVMe uses a Phison-controller , but I rarely install anything on it. Most of my software and games are stored on two other NVMe drives that don't use Phison controllers.

Hopefully the can fix it quickly.
 
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Bugs like this are insane. It seems pretty clear that either one of two things is happening. Microsoft isn't testing Windows 11 system updates on a wide variety of machines, or Microsoft detects bugs like this and knowingly releases the update anyway.
 
Bugs like this are insane. It seems pretty clear that either one of two things is happening. Microsoft isn't testing Windows 11 system updates on a wide variety of machines, or Microsoft detects bugs like this and knowingly releases the update anyway.
My guess is there are behind the scenes politics going on between MS and hardware manufacturers.
 
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Just rolled back the windows patch on my system and then paused updates until mid September when hopefully this is fixed
There's no reason not to roll back if you guys can... not worth the risk. I believe there's a 10 day limit on being able to roll back after installing a patch.
That being said, during the 6 days I had the patch installed my Samsung 9100 Pro didn't have any issues but I was mainly just playing COD and surfing the web
 
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No, the fault is caused by the defective controller.

Let me get this straight, you're blaming the controller because the terrible quality software is causing it to fail? That would be like the shitty OS melting down CPUs and you blaming the CPU for not taking the necessary precautions (more properly limit temps, time of 100% usage) to stop an OS from destroying it. Sure, the hardware manufacturer has some responsibility for the clusterfuck but obviously the main problem is the shitty fucking OS
 
Let me get this straight, you're blaming the controller because the terrible quality software is causing it to fail?
Yes if it is really the case that the controller is failing it is the hardware manufacturer fault. Samsung and Intel SSD controllers working just fine that means something is fishy with the Phison controller. By your logic we should also blame MS that the power connectors on 4090s are melting because Windows is letting the GPU draw to much power.
 
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Imagine how bad the next version of windows will be with it completely bloated with AI nonsense and voice controls. I might give up PC gaming and just play whatever I can run on Linux rather than deal with that.
 
Just rolled back the windows patch on my system and then paused updates until mid September when hopefully this is fixed
There's no reason not to roll back if you guys can... not worth the risk. I believe there's a 10 day limit on being able to roll back after installing a patch.
That being said, during the 6 days I had the patch installed my Samsung 9100 Pro didn't have any issues but I was mainly just playing COD and surfing the web


Use the utility I linked to, you can enable updates back whenever you want. Windows Updates have repeatedly ignored my instructions for when to update in the past and even if these fucking idiots say they fixed it you still shouldn't trust them for something so important

Yes if it is really the case that the controller is failing it is the hardware manufacturer fault. By your logic we should also blame MS that the power connectors on 4090s are melting because Windows is letting the GPU draw to much power.

The connectors were melting down during regular OS/gaming operation, if Windows were overclocking the GPUs or locking them to 100% usage for hours then it would be the OS's fault, how on earth can't you see the obvious difference?
 
Imagine how bad the next version of windows will be with it completely bloated with AI nonsense and voice controls. I might give up PC gaming and just play whatever I can run on Linux rather than deal with that.

Installing Steam on Linux now comes with the full Proton package so that you can play the vast majority of Windows games, often even with better performance due to how fucking bloated Windows are. Nvidia drivers are kind of mid on Linux and kernel anticheat multiplayer games don't work but that's it
 
I JUST fixed an issue with my display settings not loading from a update that broke it. Windows updated and broke it, uninstalled the update... fixed. Reinstalled itself a week later and broke it again. Did an in-place upgrade... no go. Did near every normal trouble shooting step... nope. Managed to find a guy on reddit that said to delete a bunch of "windows." files in appdata and bam, fixed. Why couldn't a freaking troubleshooter delete those problematic files for me? So dumb.

I hate Windows for those completely random breaking updates. Always had'em. I've had far less issues on my Mac and I'm on the OS 26 beta atm.

Now this... sigh.
 
Just rolled back the windows patch on my system and then paused updates until mid September when hopefully this is fixed
There's no reason not to roll back if you guys can... not worth the risk. I believe there's a 10 day limit on being able to roll back after installing a patch.
That being said, during the 6 days I had the patch installed my Samsung 9100 Pro didn't have any issues but I was mainly just playing COD and surfing the web
I did the same. I also have dont have NVM:es with the affected controller (Samsung 990 pro and Solidigm P44 Pro)

However rolling back seems like the way to go here. Also just paused updates for 5 weeks - MS should fix this in that time

Edit: Cant wait for Steam OS to fully support Nvidia - i will gladly replace Windows on my gaming systems at that time
 
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